An enzyme is most commonly known as a biological catalyst. Being a catalyst, it speeds up the rate (kinetics) of certain reactions but maintains component concentrations at equilibrium (thermodynamics). Catalysts speed up rates of reactions by going through a mechanism that follows a different pathway, which has a significantly reduced energy of activation.
An enzyme _______.
A. becomes part of the final products
B. is nonspecific for substrates
C. is affected by heat and pH
D. is consumed by the reaction